Mechanical movement.



Nn. 667,450. Patented Feb` 5, |90I.

" G. F. MGINDOE.

MEcHA'NlcAL MQVEMENT.

( A'ppucacion med Aug. 14, 1900.)

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No. 667,45*(1. Patented Feb. 5, |90.

MECHANICAL MOVEMENT.

(Application led Aug. 14, 1900.)

A(No Model.) 2 Sheets- Sheet -2.

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UNITED STATES PATENT OFFICE.

GEORGE F. MCINDOE, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO JAMES W. MCINDOE, OF SAME PLACE.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 667,450, dated February 5, 1901.

Application filed August 14, 1900. Serial No. 26,818. (No model.)

To @ZZ whom it may concern,.- bracket 7, formed in one piece with or secured Be it known that I, GEORGE F. MCINDOE, to and projecting inward from said girth, are of Boston, in the county of Suffolk and State mounted the revoluble shafts 8, 9, l0, and 11. of Massachusetts, have invented a new and The shaft 8 is the driving-shaft and has firmly 5 5 useful Mechanical Movement, of which the secured on one end thereof the driving-pulley following, taken in connection with the ac- 12 and between said frames the pinion 13, companying drawings, is a specification. which engages with and imparts motion to My invention relates toa mechanical movethe gear-wheel 14, firmly secured upon the ment, and has for its object the production of shaft 9, as shown in Fig. 2. The gear-wheel 6o Io a simple, eective, and durable means of im- 14 has set in one side thereof the crank-pin parting to a shaft and any object carried 15, (shown only in dotted lines in Fig. 2,) thereby two revolutions in the same direcupon which is mounted one end of the contion, with a short standstill between said two necting-rod 16, the opposite end of which is revolutions, by means of a single reciprocaforked and has set in a fixed position in the 65 tion or a baok-and-forth motion of the impelprongs of said fork the stud 17. (Shown in ling object, and is especiallyT adapted, among Fig. 4 and by a dotted circle in Fig. 2.) Upon other uses, to operating the impression-cylsaid stud is loosely mounted between the inder of a printing-press of the class termed prongs of said fork the spur gear-wheel 18, two-revolution oylinderpresses; and it the teeth of which on its under side engage 7o zo consists in certain novel features of constructhe teeth of the stationary rack 19, irmly setion, arrangement, and combination of parts, cured to the frame 1, and at its upper side which will be readily understood by reference with the rack 20, secured to or formed in one to the description of the accompanying drawpiece with the carriage 21, mounted upon and ings and to the claims hereto appended and movable endwise of the guide-bar 22, mounted 75 in which my invention is clearly pointed out. in a fixed position in ears 23, projecting in- Figure 1 of the drawings is a perspective ward from the frame 1, as shown. view of a machine embodying my invention.A The carriage 2l is provided with two in- Fig. 2 is sectional elevat-ion of the same, the wardly-projecting ears 24, one at each end, cutting plane being on line A A on Fig.Y 3. in which are iitted the pivot-screws 25, upon 8o 3o Fig. 3 is an end elevation looking at the leftwhich is mounted the oscillating bar or plate hand ends of Figs. 1 and 2. Fig. 4 is a ver- 26, the two Wings of which radiate from its tical section on line B B on Figs. 1 and 2 axis of motionin different planes and extend looking toward the right of said figures, but to equal distances from said axis of motion, with the pivoted or oscillatingrack in changed and each wing has formed upon its edge a se- 85 position. Fig. 5is an inside elevation of the ries of rack-teeth all so arranged that when side frame 2, with certain parts carried therethe upper wing is in a vertical position its by. Fig. 6 is a vertical section on line C C teeth will be in engagement with the teeth of on Fig. 5. Fig. 7 is a plan or edge view of a the gear-wheel 27, firmly secured upon the portion of the pivoted rack drawn to an enshaft l1, which is the shaft to which it is de- 9o 4o larged scale. Figs. 8 and 9 are, respectively, sired to impart two revolutions in the same a side elevation and a transverse section of direction at each back-and-forth motion of the carriagewhich carries the oscillating rack; the carriage 21 and may be said to represent and Fig. 10 is a plan of the carriage and the the shaft of the impression-cylinder of a reoscillating double rack pivoted thereto, with eiprocating-bed printing-press, while the car- 95 one of the ears of said carriage shown in secriage 21 may represent the bed of said press. tion, said figure being drawn to an enlarged If the plate 26 be moved about its axis from scale. the position shown in Fig. 4 to the position In the drawings, land 2 are the side frames, shown in Fig. 3, the teeth on the upper edge of dierent lengths and connected together thereof will be disengaged from the teeth of roo 5o by the tie-rods 3, 4, and 5 and the girth 6, as the gear-wheel 27, and the teeth on the lower shown. In bearings in said frames and in the edge thereof will be engaged with the gearwheel 29, fixed on the shaft 10, the inner end of which has its bearing in the stand 30. (Shown in Fig. 4.)

The central portion of the pivoted rackplate 26 is provided with a series of gearteeth 31, arranged in the form of a segment concentric with the axis of motion thereof and extending the entire length of said plate, as shown in Figs. 2, 3,-and 4.

The ends of the shafts 10 and 11 have secured thereon outside of the frame 2 the spur gear-wheels 32 and 33, respectively, and said gears are connected by the intermediate gear-wheel 34, mounted upon a stud set in the stand 35, secured to the frame 2, as shown.

A rocker-shaft 36 is mounted in suitable bearings 37 and 38, secured to the frame 2, and has secured thereon near the bearing 37 the gear-segment 39 and upon its opposite end the arm 40, having the gear-segment 41 on its inner end, which is always in engagement with the teeth 31 on the oscillating rackplate 26 and by its movement about the axis of the shaft 36 will oscillate said rack-plate at the proper time to change its engagement from the gear-wheel 29 to the gear-wheel 27, or vice versa.

0n the inside of the frame 2 and nearly opposite the bearing 37 is mounted so as to be moved vertically the plate or bar 42, having formed upon or secured to the outer face of its upper end a short toothed rack 43, which engages the teeth of the segment 39, so that by a vertical reciprocation of said plate the shaft 36 will be oscillated, and through the action of the segment 41 upon the teeth 31 of the rack-plate 26 said plate will be moved about its pivotal axis.

The plate 42 is moved upward and downward to oscillate the shaft 36 by the cam 44, secured upon the shaft 9 and acting alternately upon the trucks 45 and 46, mounted on studs set in said plate 42 at opposite ends thereof, as shown in Figs. 5 and 6.

To insure certain engagement of the teeth of the pivoted rack-plate with the gears 27 and 29 when it is oscillated, I make three or four of the teeth at each end of the rack-plate 26, on both the upper andloweredges thereof, with tapered or wedge-shaped rear ends, as shown at 47 on Fig. 7.

The operation of my invention is as follows: The several parts of the machine being in the positions shown in the drawings, if the pulley 12 be revolved in the direction indicated by the arrow ct, Fig. 1, the first operation produced is for the cam 44 to move the plate 42 and its rack 43 upward, thereby moving the shaft 36 about its axis to raise the inner or toothed end 41 of the arm 40, and thus rock the pivoted rack-plate 26 from the position shown in Fig. 3 to the position shown -in Fig. 4, with its upper rack-teeth in engagement with the teeth of the gear-wheel 27. This reversing of the position of said rack-plate 26 takes place while the crank-pin 15 is passing the dead-centers and is accomplished so rapidly that no perceptible movement of said plate in the direction of its length takes place during such reversing; but a continuation of the movement of the crank-pin 15 about the axis of the shaft 9 until it reaches the opposite dead-center causes the rack-plate 26 vto be moved endwise toward the right of Figs. 1 and 2 just far enough for its teeth to impart to the gear 27 and the shaft 11 one complete revolution, when the cam 44, acting upon the truck 46, moves the plate 42 and its rack 43 downward, thereby reversing the motions of the shaft 36 and the arm 40, thereby moving the rack-plate 26 about its axis of oscillation to disengage the teeth on its upper edge from the gear 27 and cause the teeth on its lower edge to engage the teeth of the gear-wheel 29, when the rack-plate will be moved toward the left of Figs. 1 and 2, thereby rotating the gear 29, its shaft 10, and the gear 32 in the direction indicated by the arrow b on Figs. 1 and 2. The intermediate gear 34 will be revolved in the direction indicated by the arrow c on Fig. 1, and the shaft 11 and gears 27 and 33 will be revolved in the same direction as before and as indicated by the arrow d on Figs. 1 and 2. These operations may be continued indefinitely, or as long as rotary motion is imparted to the pulley 12 either by hand or power.

What I claim as new, and desire to secure by Letters Patent of the United States, is-

1. The combination of -a shaft to be revolved intermittently always in the same direction; a second shaft' arranged in a position below said first-mentioned shaft and parallel therewith a pair of duplicate gear-wheels secured one on each of said shafts in the same vertical plane but separated from each other; a pivoted reciprocating rack-plate provided with two series of rack-teeth arranged on opposite edges thereof and adapted to alternately engage said two gears; a train of gears connecting said two shafts in a plane parallel to said first-mentioned gears; means for reciprocating said rack-plate; and means for moving said rack-plate about its pivot-al axis at the end of each endwise movement thereof to change the engagement of said rack-plate from one gear to the other.

2. The combination of two parallel shafts arranged one abcve'the other; a pair of gearwheels of equal diameters, but considerably less than the distance between the centers of said shafts mounted one upon each of said shafts and in the same vertical plane a reciprocating carriage mounted on suitable guideways between said shafts; a pivoted rackplate carried by said carriage and provided with two series of rack-teeth on opposite edges thereof, the face of the teeth on one edge being at an angle to the face of the teeth on the other edge, and also provided with the longitudinally-extending teeth 31 arranged concentric to its axis of vibration; means for reciprocating said carriage and rack-plate; a rocker-shaft; a toothed segment carried by IOO said shaft and engaging the longitudinal segmental teeth on said rack-bar; a verticallymovable bar provided With a short toothed rack on its upper end; a second toothed segment carried by said rocker-shaft and engaging said short vertically-movable rack; a cam constructed and arranged to act upon said vertically-movable bar to move it and its rack, to oscillate said rocker-shaft; and a train of gears connecting said parallel shafts in a plane parallel to said first-mentioned gears.

3. The combination of the shafts 10 and 11 arranged one above the other; the gears 29 and 32 mounted on shaft 10; the gears 27 and 33 mounted on shaft 11; the intermediate gear 34 engaging gears 32 and 33; the carriage 21 mounted on a suitable guideway; the rack 20 carried by said carriage; the xed rack 19; the rack-plate 26 pivoted to said carriage and having a series of rack-teeth on each edge thereof and a segment of longitudinally-extending teeth 31; the crank 14, 15, the connecting-rod 16; the gear-wheel 18 carried by the forked end of said connecting-rod 16, and

engaging the fixed rack 19, and the rack 20 on the carriage 21; the rocker-shaft 36; the toothed segments 39 and 41; the rack-bar 42, 43; the trucks 45 and 46 carried by said bar 42; and the cam 44 all constructed arranged and operating substantially as described.

4. As a means of alternately rotating two gear-Wheels, arranged in the same vertical plane, always in the same direction, the reciprocating and oscillating rack-plate 26, having a series of rack-teeth on each edge thereof, each of which series of rack-teeth is arranged to engage the teeth of one of said two gears while the other of said series of racks is disengaged frorn the teeth of the other of said gears, and vice versa.

In testimony whereof I have signed my name to this specication in the presence of two subscribing Witnesses on this 8th day of August, A. D. 1900.

GEORGE F. MCINDOE.

Witnesses:

N. C. LOMBARD, JAMES A. WooDBURY. 

